Home / 1,127.22-1,555.57-629.86

Finding the Fourth Proportional to 1,127.22, 1,555.57 and 629.86

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Solution

The fourth proportional to 1,127.22, 1,555.57 and 629.86 is: 869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.22 : 1,555.57 = 629.86 : x
  2. Step 2: Convert to fraction form
    1,127.22/1,555.57 = 629.86/x
  3. Step 3: Cross multiply
    1,127.22x = 1,555.57 × 629.86
  4. Step 4: Simplify right side
    1,127.22x = 979,791.14
  5. Step 5: Solve for x
    x = 979,791.14/1,127.22
  6. Step 6: Final answer
    x = 869.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.